如何格式化WPF Datagrid上的标头？

<DataGrid.HeaderStyle>
   <Style TargetType="{x:Type DataGridColumnHeader}">
       <Setter Property="Background" Value="LightBlue"/>
       <Setter Property="Foreground" Value="Black"/>
       <Setter Property="FontWeight" Value="Bold"/>
       <Setter Property="FontSize" Value="14"/>
       <Setter Property="HorizontalContentAlignment" Value="Center"/>
    </Style>
</DataGrid.HeaderStyle>

<DataGrid.Columns>
    <DataGridTextColumn Header="姓名" Binding="{Binding Name}"/>
    <DataGridTextColumn Header="年龄" Binding="{Binding Age}"/>
    <DataGridTextColumn Header="性别" Binding="{Binding Gender}"/>
</DataGrid.Columns>